World News

World News14.02.2024

Chinese scientists say new calcium-based battery offers ‘cheaper, safer’ alternative to lithium-ion cells

QAZAQ GREEN. Chinese scientists say they have developed a rechargeable calcium-based battery that could offer a cheaper and more sustainable alternative to lithium technology, South China Morning Post reports.

The team also incorporated their calcium-oxygen device into fibres to create a flexible textile battery that could power a smartphone.

Made from a metal 2,500 times more abundant than lithium, their battery was able to stably charge and discharge completely 700 times at room temperature – a first for the calcium-based technology.

“[The battery could turn] calcium chemistry into a promising, sustainable energy-storage technology,” the team from China’s Fudan University said in a paper published in the peer-reviewed journal Nature.

Lithium-ion batteries are known for their high energy density – or energy storage capacity relative to weight or size – and are the most widely used worldwide.

However, ensuring a reliable supply of lithium is critical to expanding on sustainable industries like renewable energy storage and electric vehicles.

The International Energy Agency has forecast lithium shortages by next year as demand for EVs surges amid a global net zero push. Mining lithium is also a costly and highly water-intensive process.

Batteries made from calcium were “expected to be cheaper and safer than lithium-ion batteries” while offering a comparable theoretical energy capacity, the paper said.

The team said that of the types of calcium-based batteries, calcium-oxygen systems had the “highest theoretical energy density”. This is because the fuel for the battery comes from oxygen in the air rather than a material stored inside the battery.

However, calcium-oxygen batteries do not operate stably at room temperature, and thus far a rechargeable battery capable of doing so had “not been achieved”, according to the paper published on Wednesday.

Finding an electrolyte – the component in a battery that enables it to charge and discharge – that did not cause calcium reactions that limited battery capacity had been a major challenge for researchers, the team wrote.

To solve this problem, the Fudan team created a liquid-based electrolyte that could house both the calcium and oxygen components of the battery.

The rechargeable battery they produced could offer a cheaper alternative to lithium-based batteries, with potentially wide-ranging applications, the team said.

What is climate finance, and why is it crucial to the global energy transition?

“The proposed calcium-oxygen battery is stable in air and can be made into flexible fibres that are weaved into textile batteries for next-generation wearable systems,” the team wrote.

After depositing the components of the battery onto fibres, the researchers found that their fibre battery was able to operate stably even when bent from zero to 180 degrees.

“Using a commercial braiding machine, we wove these fibre batteries into breathable and flexible battery textiles that can power electronic devices such as mobile phones,” the paper said.

While the performance and capacity of their battery was still limited, the team said further engineering could improve the operation of their battery, and that their research also opened more avenues to produce calcium batteries with other materials.


Australia has planned a 1 GW hydroelectric power plant at former coal pit
Apple ramps up investment in clean energy and water around the world
Two countries in Europe are powered by 100% renewable energy as wind capacity soars
IRENA’s report: Transition to renewables calls for new approach to energy security
New wind power plant to be built in Baku
Cost of bringing wind power plants into operation drops by more than one-third
Energy ministers and leaders to discuss the future of renewable energy in Abu Dhabi
Hungary boasts the EU's largest geothermal system
EC adoped of the strengthened Energy Performance of Buildings Directive
90-GWh thermal energy storage facility could heat a city for a year
Europe embraces speedier, riskier way of building power grids
Former SpaceX, General Motors engineers turn to space-based solar power
The US just beat its goal to permit 25 GW of clean energy by 2025
New quantum material boosts solar cell efficiency to 190%
Astana hosted seminar of the USAID project “Energy of Central Asia”
Uzbekistan launches 500 MW PV plant in Jizzakh province
GIZ and RES School: training specialists for the energy transition in Karaganda
US unveils USD 20bn of awards under Greenhouse Gas Reduction Fund
In Tajikistan, all new houses will be equipped with solar panels
The top 40 most environmentally friendly cities in the world